Contoured 100% New Zealand wool blanket top can be folded back for shim placement if necessary and lays clean and flat against the pad. Contoured felt body with a shaped design to mimic the horses topline. PORON® Performance Cushioning insert is lightweight, conforming and provides serious shock protection that does not diminish over the life of the pad. 5/8'' orthopedic grade felt bottom soaks up moisture, allowing heat to dissipate away from the horses back. Conforms to the back while maintaining density. The ESP is a convenient one-pad system perfect for all disciplines.